One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,12)(5,9)(6,10)(7,14)(11,13)(15,16)(17,18)(19,26)(20,23)(21,24)(22,25)(27,30)(28,31)(29,32)(33,34,38,37)(35,41,43,39)(36,40,44,45)(42,47,48,46)(1,3)(2,5)(4,11)(6,9)(7,13)(8,10)(12,15)(14,16)(18,20)(19,24)(25,28)(27,32)(36,44)(40,45)(42,48)(46,47) involution — undirected(17,19)(18,21)(20,26)(22,27)(23,24)(25,29)(28,30)(31,32)(33,35)(34,39)(36,42)(37,41)(38,43)(40,46)(44,48)(45,47) involution — undirected(1,4,6,14)(2,7,10,12)(3,11,9,16)(5,13,8,15)(17,20,23,18)(19,26,24,21)(22,28,31,25)(27,30,32,29)(33,36)(34,40)(35,42)(37,45)(38,44)(39,46)(41,47)(43,48)(1,3)(2,8)(4,11)(5,10)(6,9)(7,15)(12,13)(14,16)(17,21,23,26)(18,24,20,19)(22,30,31,29)(25,27,28,32)(33,37,38,34)(35,41,43,39)(36,45,44,40)(42,47,48,46)(1,5,6,8)(2,9,10,3)(4,13,14,15)(7,16,12,11)(17,22,23,31)(18,25,20,28)(19,27,24,32)(21,29,26,30)(33,35)(34,41)(36,42)(37,39)(38,43)(40,47)(44,48)(45,46)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.